When former serial killer Carol takes her place in a luxury retirement home, she begins to find her feet with a small new group of friends. If she can only keep her past hidden, maybe she has a chance at happiness. That's when she discovers that, absurdly, every other one of Sheldon Oaks residents was involved in the law somehow. It's not long before her true identity is leaked, and when a former police commissioner resident is murdered, naturally all eyes turn to her... Now she must solve the case to prove her innocence—just as her new friends start their own investigations into whether there is more than one killer at Sheldon Oaks.